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Quote:
Originally Posted by markw
Arguing about a spliced, well teisted and soldered connection vs. a straight run is like arguing the difference in speed a car can make wether the driver has 50 cents in dimes in his pocket or not.
It might be a theoretical possibility, but preceiving or measuring it accurately is impossible.
Hijack warning!
What if the driver has a woody? Can that be measured accurately?:idea:
Sorry in advance,:ciappa:
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I agree...
Quote:
Originally Posted by markw
Arguing about a spliced, well teisted and soldered connection vs. a straight run is like arguing the difference in speed a car can make wether the driver has 50 cents in dimes in his pocket or not.
It might be a theoretical possibility, but preceiving or measuring it accurately is impossible.
...as far as I'm concerned the point is moot and most of the thread has gone well beyond it's original scope and intent, but when we get into semantics and space agency soldering certificates...well...
jimHJJ(...you know the drill...)
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"Got...
Quote:
Originally Posted by GMichael
Hijack warning!
What if the driver has a woody? Can that be measured accurately?:idea:
Sorry in advance,:ciappa:
...'34 wagon and we call it a woody...Surf City here we come..."
Nothing to be sorry about,,,this thread went sideways after about post # 2 and without a doubt after #17...
Maybe we should go way off and try to discuss the impact of RoHS, ISO and WEEE lead-free standards....
jimHJJ(...or not...I vote for the latter...)
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Quote:
Originally Posted by markw
It might be a theoretical possibility, but preceiving or measuring it accurately is impossible.
actually, the solder connection will introduce an impedance change to the transmission line causing a variation in sound output from the speakers
rofl
edit... incase anyone takes this the wrong way, this was a joke... although an impedance change will occur from a solder point, temperature changes in the voicecoil will chance impedance a greater level than a single solder joint...
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Quote:
Originally Posted by Resident Loser
Maybe we should go way off and try to discuss the impact of RoHS, ISO and WEEE lead-free standards....
what solder is being used to conform to RoHS?
also...
I would like to know what happens during this solder process...
if there is some combination of metals, what is the chemistry here?
I have a friend working on his doctorate, perhaps I'll have to check with him ;o)
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As far as I know...
Quote:
Originally Posted by Rock789
what solder is being used to conform to RoHS?
also...
I would like to know what happens during this solder process...
if there is some combination of metals, what is the chemistry here?
I have a friend working on his doctorate, perhaps I'll have to check with him ;o)
...there are formulations that use tin, copper and silver...but there seems to be some field problems...not to mention the higher temps needed in the fabrication process...And there ARE conductive glues but they're not quite up to snuff either or so it would seem. The industry isn't crazy over the whole enchilada due to the added costs.
Ain't no specialist but, when metal gets hot it expands...solder melts at a relatively low temp (compared to the melting point of the surfaces to be joined) and migrates into the hot metal...Are there spaces formed in the atomic structure that wicks the solder toward the heat?...yeah, I guess so, but again it's really very shallow and it could be scraped off with an X-acto knife or abrasive...Does the solder form a mechanical bond...yes, but the items soldered can be easily separated...of course it all depends on if you made elephant b@lls with the solder or not...And then you get into fractures if the parts move before the solder cools completely and all sorts of cr@p...and that's why eutectic solders were born...
And then you get into SMT and reflow soldering, which gets into soldering pastes and surface tensions and wetting, and wicking and the pads of the parts settling in on the PCB lands as the carrier evaporates and displaced solder migrates and forms the fillet which becomes the mechanical bond and has absolutely nothing to do with splicing wires...
jimHJJ(...and the reason why it was mentioned in the first place eludes me...)
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Quote:
Originally Posted by GMichael
What if the driver has a woody? Can that be measured accurately?:idea:
Isaid fifty cents in dimes in his pocket, not a roll of quaters
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